中孔隙率通孔多孔铝合金的压缩性能研究  

Compressive Properties of Open-cell Porous Al Alloy with Middle Porosity

作　　者：王展光[1,2] 杨维汉[3] 杜晟连[2] 蔡萍[1,2] 

机构地区：[1]凯里学院,贵州凯里556011 [2]井冈山大学,江西吉安343009 [3]南昌工程学院,江西南昌330300

出　　处：《热加工工艺》2014年第18期66-69,共4页Hot Working Technology

基　　金：凯里学院博士启动项目(2013)

摘　　要：在采用复模铸造工艺制备孔径3.5~4.0 mm、孔隙率65.8%~87.3%的通孔多孔铝合金基础上,通过单轴压缩试验,研究通孔多孔铝合金的压缩性能和吸能能力。通孔多孔铝合金单轴压缩应力应变曲线,呈现线弹性变形、塑性平台段和压缩紧实阶段3个阶段。通孔泡沫铝合金的压缩屈服强度、吸能能力随孔隙率增大而减小,通孔多孔铝合金的压缩屈服强度与Gibson-Ashby的模型拟合结果吻合。Based on open-cell porous Al alloy（d =3.5-4.0mm, P =65.8%-87.3%） prepared by applying investment casting, the mechanical properties and energy absorption capacity under uniaxial compression were investigated by compressive test. The compressive stress-strain curve of open-cell porous Al alloy consists of three distinct regions, such as linear elasticity region, plastic collapse region and densification region. The compressive strength and energy absorption capacity of open-cell porous Al alloy decreases with the increase of the porosity. The compressive yield strength of open-cell porous Al alloy is in accordance with the strength obtained by Gihson-Ashby model.

关 键 词：通孔多孔铝合金 孔径 压缩性能 吸能能力 

分 类 号：TG124.6[金属学及工艺—金属学]